Juspay Technologies Sdet Engineer Interview Questions and Answers

Q1. Internal Implementation of HashMap
Ans. 
HashMap is implemented using an array of linked lists to handle collisions.
• HashMap stores key-value pairs in an array of linked lists

• Hash function is used to determine the index of the array where the key-value pair will be stored

• Collision handling is done by chaining, where multiple key-value pairs with the same hash value are stored in the same linked list

• HashMap allows null keys and values

• HashMap is not synchronized...read more
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Coding and aptitude round

Q1. Tree dsa questions
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Q1. Horse race question
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Q1. Location specific question
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Q1. Doubly and curcular linked list
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It was of 1 hr and had 3 questions from 2d array

Asked basic medium level leetcode programming questions

Q1. Questions about my projects
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Q2. Some basic system design
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Tricky we have to solv 60 question in 50 minutes

Q1. In this example, the internal data structure (std::vector) can be changed to another type (e.g., std::list) without affecting how users interact with the Example class, as long as the public methods (add, ...read more
Ans. 
Yes, the internal data structure can be changed without affecting user interaction as long as public methods remain the same.
• Use abstraction to hide implementation details from users

• Ensure public methods have consistent behavior regardless of internal data structure

• Consider using interfaces or abstract classes to define common behavior
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Q2. In this , the internal data structure (std::vector) can be changed to another lorem ipuse hfkft what if this id skd
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